Explosive-engine.



No. 864,818. PATENTED SEPT. 3, 1907.

' A. E. WOLGOTT.

EXPLOSIVB ENGINE. APPLICATION mmn JAN. 27, 1905.

M/ne-FJe-t sew/2%" 24% W fg I 3 1 a. ZJ6M ter between the boxes 12.

ALVEN E. WOLGOTTTTYF TAOOMA, WASHINGTON.

EXPLOSIVE-ENGINE.

Specification of Letters Patent.

Patented Sept. 3, 1907.

Application filed January 27, 1905. Serial No- 242,899.

To all whom it may concern: 7

Be it known that I, ALV EN E. WOLCOTT, a citizen of the United States of America, residing at Tacoma, in the county of Pierce and State of Washington, have in vented certain new and useful Improvements in Explosion-Engines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to explosion engines and cspeciallyto that class known as two-cycle engines, and has for-its objects, first, to improve the means of conducting the air from the air chamber to the back of the explosion chamber, and; second, to improve the means of increasing the amount of air admitted into the explosion chamber so as to more thoroughly drive out the exhausted gases therefrom. I attain these objects by the devices illustrated in the accompanying drawing, in which,

Figure 1 is a vertical section through my engine when the piston is at the top of the explosion chamber, and, Fig. 2 is a similar view with the piston at the bottom thereof. 7

Similar numerals of reference refer to similar parts throughout the several views.

The engine illustrated in the drawing belongs to that type in which the hydro-carbon vapor is sprayed into' the cylinder in which air has been'compressed; and in which the mixture of air and vapor is exploded by bringing it in contact with a hot bulb. My invention is however applicable to those engines inwhich the charge is exploded by electric spark or by any other system. V In the drawings the frame consists of a base 1 and an upper portion 2 joined together in the plane of the center of the engine shaft. The base 1 has anv air opening 3 which may be located either in the bottom or at any point below the partition 4 This partition 4 extends across the base frame 1 and is provided with a small vertical cylinder 5 having air ports 6 through its walls; A piston 7 reciprocates in the cylinder 5 in such manner as to uncover the ports 6 when it is near the bottom of its stroke. The piston 7 is worked, by means of an eccentric 8 and rod 9, from the main shaft 10 of the engine. The position of the partition 4 in the base frame 1 is such as to allow the main crank plenty of room to work.

The main shaft 10 carries the two fly wheels 11 on the sides of the engine, and passes through the suitable boxes 12 made in the junction of the parts 1 and 2 of the frame, and has a crank 13 in the cen- The eccentric 8 is placed to one side of the crank 13? The joint between the parts 1 and 2 of the frame, and around 0 air-tight. frame is securely fastened to the base part 1 and forms the main part of the engine, being constructed as is usual with two-cycle engines, with a water jacket'14 surrounding the. explosion chamber 15 which is the upper part of the frame 2'; with an air passage 16 leading from the air chamber 17 to the lower end of the explosion chamber 15 and with an exhaust port 18 located at the end of the explosion chamber 15 at a point opposite to the air passage 16 and a little above it. The cylinder head 19 is secured to the upper part of the frame 2 and closes the explosion chamber 15, and "has a hot bulb 20 centrally secured thereto and extending therefrom. The hot bulb 20 maybe surrounded by the protecting bulb 21 which is removably secured to the cylinder head 19. The hydro usual on such engines and is connected to the crank 13 by the connecting rod 27 in the usual manner.

On the top of the piston 26 -I secure my improved de- 'flector which consists of a vertical tube 28 secured to the center of the piston 26 and having a foot 29 extending therefrom to the side of the piston at a point in line with the opening of the air passage 16. This foot and tube I prefer to make open at the bottom and 1 bars 32 The baffle plate 31 is placed so as to direct the current of cold air towards the sides of the explosion chamber 15 so that the cold air will not-be blown up into the hot bulb 20 and thus cool it The length of the tube 28 and the bars 32 is such as to bring the baflle plate 31 just below the upper end of the explosion chamber 15 when the piston is at the bottom of its stroke, and the length of the hot bulb 20 is such that when the piston is at the top of its stroke the baflie plate 31 will not quite touch the end of the bulb. v

The operation of my improved engine maybe briefly described as follows: When the piston 26 is at the top of its stroke the clearance in the explosion chamber 15 is full of compressed air and as soon as the spray of hydrocarbon vapor is admitted thereto through the pipe "22 and comes in contact with the hot bulb 20, it explodes driving the piston 26. down, and

rotating the shaft 10. Meantime the piston 7 of the small cylinder 5 in the partition 4of the base 1 is at the lowest point in its stroke when the piston 26 is at its highest point; The air ports 6 are therefore uncovered and air is drawn into the air chamber 17 As the piston 2G moves downward under the impulse of the explosion above it, the piston 7 moves up and closes the air ports. The air in the air chamber 17 is therefore compressed by the pistons 26 and 7'until the top of the piston 26 has reached the opening of the air passage 16 when direct communication is established between the air chamber 17 and the explosion chamber 15 through the air amount of air admitted is sufficient to thoroughly cleanse the chamber 1.5, and all the clearance space therein, from the exhausted gases. Since the tube 28 conducts this new air to the top of the chamber 15 there is no chance of the new air passing through the exhaustport before all the burned out air is expelled from the chamber.

Having described my invention, what I claim is:

1. An explosion engine comprising a frame with an explosion cylinder formed in one end, a compression chamber formed in the middle, an admission chamber formed in the other end, and an auxiliary compression cylinder formed in the end wall of said compression cliambgr and having ports from said admission chamber into said auxiliary c \'linder; with a reciprocating piston in said explosion cylinder and compressing the air in said compression chamber; an auxiliary piston working in said auxiliary cylinder with said first piston and uncovering the ports to admit air into 'said compression chamber from suid admission chamber and compressing auxiliarly into said compression chamber and drawing air into said admission chamber; a passage leading from said compression chamber to the lower end of said explosion cylinder and adapted to be uncovered by said first piston to admit air to said explosion cylinder; and an exhaust port from said explosion cylinder at a point opposite to said air passage port.

2. In an explosive engine, a tube centrally secured within the explosion chamber to the piston and being open at the top. a baiile plate secured to the end of the tube and adapted to guide the air therefrom to the sides of the explosion chamber, and an open ended lateral extension to the bottom of said tube passing therefrom along the top of the piston to a point adapted to receive the air from the air passage.

In testimony two witnesses.

whereof I atiix my signature in presence of ALVEN E. \VOLCOTT.

Witnesses M. H. Comer, M. A. VAN HOUSE. 

